Can Angelfish Live With Guppies?

Why angelfish eat guppies

Angelfish are cichlids. They're not aggressive in the way an Oscar or a convict cichlid is, but they are natural predators of small fish and invertebrates in the wild Amazon basin. They hunt by sight and strike quickly at anything moving and small enough to swallow.

A standard male guppy reaches about 3-4 cm (1.2-1.6 in). A female tops out around 5-6 cm (2-2.4 in). A mature angelfish body (excluding fins) typically spans 10-15 cm (4-6 in). Do the arithmetic: most guppies fall well within the predation window for an adult angelfish.

The usual scenario plays out like this: you buy juvenile angelfish and juvenile guppies at the same time, everything looks fine for a few months, and then the angelfish grow. One morning you count your guppies and there are fewer than yesterday. A week later, there are none. The angelfish weren't "being aggressive" - they were being angelfish.

The water parameter problem

Even if you somehow solved the predation issue - say, by keeping only large female guppies with young, small angelfish - the chemistry requirements push in different directions.

pH and hardness

Guppies are livebearers from brackish-influenced Caribbean and South American coastal waters. They do best at pH 7.2-8.0 and a general hardness (GH) of 8-12 dGH. Soft, acidic water stresses them, suppresses immune function, and leads to fin rot and wasting.

Angelfish come from slow-moving Amazonian blackwater and clearwater rivers. Their ideal range is pH 6.5-7.0, GH 3-8 dGH. They can adapt to pH 7.2 reasonably well, but above 7.5 you'll see slower growth, increased susceptibility to disease, and reduced breeding success over time.

You can find a midpoint - pH 7.0-7.2, moderate hardness - that both species survive in. But "surviving" and "thriving" aren't the same thing, and long-term health will be compromised for at least one of them.

Temperature

This is where the two species come closest to agreeing. Guppies are comfortable at 24-28°C (75-82°F). Angelfish prefer 26-30°C (79-86°F). A setting of 26-27°C (79-80°F) works acceptably for both. Temperature, at least, isn't the dealbreaker here - but it's also not a reason to ignore everything else.

What most guides miss: the guppy tail problem

Even in cases where angelfish don't outright eat guppies, they frequently nip at long guppy tails. Male fancy guppies have been selectively bred for flowing, dramatic finnage that extends well past their body. To a cichlid, that tail looks like a target.

Chronic tail nipping doesn't kill guppies quickly, but it creates ragged fins, opens infection pathways, and causes constant stress. A stressed guppy has a suppressed immune response. Within weeks you'll be dealing with fin rot, ich, or both. The angelfish may appear perfectly calm and "not aggressive" the whole time.

Tank size and setup requirements

Angelfish are tall fish - their dorsal and ventral fins can add another 15 cm (6 in) of height to their body profile. They need vertical swimming space, which means a tank at least 45 cm (18 in) deep. Standard 110-litre (30-gallon) tanks are usually cube-shaped or tall enough to work. Long, shallow tanks do not suit them regardless of volume.

Guppies, by contrast, are comfortable in most standard tank shapes and don't need much height. Their requirements around tank architecture don't conflict with angelfish, but the minimum tank size for angelfish - 110 litres for a single pair, more for a group - is significantly larger than what many guppy keepers are running.

Are there any scenarios where this works?

Honest answer: rarely, and with significant caveats.

Some keepers report long-term success keeping large female guppies (5-6 cm) with well-fed, non-aggressive individual angelfish. Female guppies lack the dramatic tails of males, which reduces nipping triggers. Well-fed angelfish are less motivated to hunt. In a heavily planted tank with plenty of cover, smaller fish have more escape routes.

But this isn't a reliable community setup - it's a lucky combination of individual temperaments. You can't guarantee it will hold, and you can't predict which angelfish will tolerate guppies and which won't until it's too late for the guppies.

If you're building a tank from scratch and want both species, build two tanks. A guppy colony tank and an angelfish community tank are both rewarding to keep. Forcing the two together isn't worth the stress - for the fish, or for you.

What to keep with angelfish instead

Angelfish are actually good community fish when paired correctly. They coexist well with fish that are too large to eat, too fast to catch, or not triggering predatory instincts with flowing fins or bright colouration.

Solid tank mates for adult angelfish include:

• Corydoras catfish - bottom dwellers that stay out of the angelfish's territory and are too armoured to be worth attacking.
• Larger tetras - rummy-nose tetras (Hemigrammus rhodostomus), black skirt tetras (Gymnocorymbus ternetzi), or lemon tetras (Hyphessobrycon pulchripinnis) are all fast enough and big enough to coexist safely.
• Dwarf gouramis (Trichogaster lalius) - similar water preferences, peaceful, and not small enough to be predated.
• Bolivian rams (Mikrogeophagus altispinosus) - compatible water parameters, similar temperament, less likely to clash than German blue rams in hard water.
• Bristlenose plecos (Ancistrus sp.) - efficient algae cleaners that angelfish ignore entirely.

Avoid small neon tetras (Paracheirodon innesi) with adult angelfish for the same reason as guppies - they're the right size to eat.

What to keep with guppies instead

Guppies belong in a peaceful community with fish that share their water chemistry preferences and won't outcompete or harass them. Good options include:

• Platies and mollies - fellow livebearers with near-identical water preferences, easy to keep together.
• Endlers livebearers (Poecilia wingei) - closely related to guppies, compatible in every sense, and striking to look at.
• Harlequin rasboras (Trigonostigma heteromorpha) - peaceful schooling fish, tolerant of slightly harder water.
• Pygmy corydoras (Corydoras pygmaeus) - small, peaceful bottom dwellers that work well at the lower temperature range guppies prefer.

See our best fish for beginners guide for a fuller breakdown of species that work in a straightforward community setup.

Before you stock anything: get the basics right

Stocking decisions only matter if your tank is properly cycled. An uncycled tank will kill guppies faster than any angelfish will. Make sure you understand the nitrogen cycle and have completed a proper fishless cycle before adding any livestock. Then check your water parameters are stable and appropriate for whichever species you're keeping.

If you're planning a stocking list, run it through the free stocking calculator first - it'll flag conflicts you might not have considered, including temperature mismatches and bioload issues.